Use space_for_shape in tessellation (#291)
* use space_for_shape instead of _modepy_space constructor
* Add a space type assert to order-1 space in tesselation, too
Co-authored-by: Andreas Klöckner <inform@tiker.net>
* use space_for_shape instead of _modepy_space constructor
* Add a space type assert to order-1 space in tesselation, too
Co-authored-by: Andreas Klöckner <inform@tiker.net>